Final answer:
The upper class boundary for the class interval 60-69 in statistics, considering continuous data, is 70, which represents the non-inclusive upper limit of the interval just before it reaches the next class interval of 70-79.
Step-by-step explanation:
The question is about identifying the upper class boundary for a given class interval in statistics. When looking at class intervals, such as 50-59, 60-69, and 70-79, the upper class boundary is the highest value that can be included in the class before reaching the next class interval. For the class interval 60-69, the value immediately before the next class interval (70-79) begins is 69. However, to be inclusive of all data, we would consider the upper class limit to be slightly higher, which is 69.5 if we assume continuous data. Thus, the correct answer to identify the upper class boundary for the class 60-69, when considering continuous data, would be c) 70, suggesting a non-inclusive upper limit and that 69.5 would round up to 70.